| 新显色剂偶氮氟胂-DBF的合成及与钍的显色反应 |
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| 引用本文： | 徐锋,郝振文,高美荣,吴斌才.新显色剂偶氮氟胂-DBF的合成及与钍的显色反应[J].华东师范大学学报(自然科学版),2004,2004(2):69-71,80. |
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| 作者姓名： | 徐锋 郝振文 高美荣 吴斌才 |
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| 作者单位： | 华东师范大学,化学系,上海,200062 |
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| 摘 要： | 合成了新显色剂偶氮氟胂-DBF，并研究了其与钍的显色反应，在3.84 mol•L-1的高氯酸介质中，钍与该显色剂形成紫红色配合物，最大吸收波长为630 nm，表观摩尔吸光系数为1.63×105 L•mol-1•cm-1， 钍含量在每25 mL 0～40 μg范围内符合比尔定律，该方法简便，灵敏度高，选择性好，用于海产品中微量钍的测定，结果满意.
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| 关 键 词： | 吸光光度 钍 偶氮氟胂-DBF 海产品 吸光光度 钍 偶氮氟胂-DBF 海产品 |
| 文章编号： | 1000-5641(2004)02-0069-03 |
| 收稿时间： | 2003-9-8 |
| 修稿时间： | 2004-3-2 |
Study on the Synthesis of 5-FAsA-DBF and Its Chromogenic Reaction with Thorium |
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| XU Feng,HAO Zheng-wen,GAO Mei-rong,WU Bing-cai.Study on the Synthesis of 5-FAsA-DBF and Its Chromogenic Reaction with Thorium[J].Journal of East China Normal University(Natural Science),2004,2004(2):69-71,80. |
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| Authors: | XU Feng HAO Zheng-wen GAO Mei-rong WU Bing-cai |
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| Institution: | Department of Chemistry,East China Normal University,Shanghai 200062,China |
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| Abstract: | A new chromogenic reagent 5-FAsA -DBF was synthesized and its colour reaction with thorium was studied， In a perchloric acid medium of 3.84 mol•L-1， 5-FAsA-DBF reacted with thorium to form a stable coordinate-complex， having its absorption maxima at 630 nm.Its molar absorptivity was found to be 1.63×105 L•mol-1•cm-1 .Beer’s law holds in the concentration range of 0～40 μg of Th(Ⅳ) per 25 mL of solution.The method has been apllied to determinate thorium in seafood with satisfactory results. |
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| Keywords: | absorption spectrophotometry thioum 5-FA3A-DBF seafood |
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